Shade or light diffuser for electric side-wall fixtures



Feb. 24, 1925. 1,527,619

H. C. ADAM SHADE OR'LIGHT DIFFUSER FOR ELECTRIC SIDE WALL FIXTURES" Fil'ed March 31 1924 Patented F eb. 24, 1925 PATELNYI? O FFl 'CE.

HARRY c. ADAM; or's'r: Louis; mssounr:

SHADE OR LIGHT DIFFUSERi-FOR ELEGTRIC SIDIii-M51 13 FIX-TU RES.

App lication ofiled MarehBl, 1924: SeriahNo 703,164.

To all whom it may concern:

Be it known: that I, HARRY C. ADAM, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in Shades or Light Diffusers for Electric Sideall, Fixtures, of which the following is a full, clear, and exact description, such as will enable others. skilled in the art to which itappertains'to make and use the same.

This inventionrelates toishades or light diffusers of the kind that are used. with electric side wall lighting fixtures- V The mainiobject ofmy present invention is to provide a shade or diffuser foran. electric side walllighting fixturethat Wlll.

produce a brilliant light at apoint under the fixture and also softly illuminate the space above, in front; of and at, the sides:

of the fixture.

Another object is to PlOVlClBAfl shadeson light diffuser for an electric, side wall fixture that will cause direct rays from the source of light to be projectedidownwardly; onto atable or desk positioned imderneath, the fixture, without: liability of any Ofatllfi:

direct rays being projected: upwardly and outwardly-into the room, thereby producing a. side wall fixture shade thatis particularly adapted for use in hospitals, owingto the.

factthat it will supply ample light to a nurses table over whichit is arrangedland at the same time illuminate the room 111 such.

a wayasto not be objectionable orJh-arm ful to. the eyes-of a patient lying: in allied, that is located at such a point that the,

patient looksat or toward thefixture Another objectxisto providea shade or light diffuser having the-desirablecharacteriistics above mentioned that is of neat and ornamental appearance, inexpensive to manufacture and 3 of such CODStIHCtJOII that dust and insects cannot collect on the inside,

of the same. Other objectstand desirable features of my invention will be hereinafter,

pointed out.

F igure l of the drawings is a side elevaa tional view of my improved ishade aor; :light diffuser arranged in OPGIELtlVB POSItlOIl'. on an electric sidewall lighting fixture; and

Figure 2 is abottom plan view of said fuser constructed? in accordance with my invention. Said-shade. comprises a translucent-top part B,,a translucent bottom part C, andatransparent part D SO COIYlblIlG-Cl and arranged that-the; major portion of the; rays from the: source of light awill pass through said translucent parts, andi thus: softly illuminate the space above, in front of and at the sides 1 of the fixture and some 1 ofthe; direct rayswvill strike against theinner-sideof said top partB and be projected downwardly from it same through said transparent part D.- The shape of thevarious/parts ofthe fixture can be mod-ifiedl without departing, from the: spirit of my invention, andsaid parts can be combinedin variousnvaysr I prefer, however, to a construct the. shade in' one piece from glass orisimilarmaterial. so as to reduce the costyof nanufacturing same and produce a shade that has no, openings through which insects-and dust can-enter and collect on the interior; of the'shade; Inpracticethe top andibottom parts B and G ofthe shade are formed: of opal: glass and the. transparent part D of the: shade isformed of crystal glass, but it is. immaterial what kind of material is used=tofor1n the parts B, G and D: of, theshade, so long :as the top part B is'constructed in such a Way thatv it will break upthera-ys thatiare thrown upwardly and-forwardly? fromtheiz source of light ac, thei'transparent' part Dwill permitlsome of the: rays that strike: against the inner surface of i'theatopipart B- to escape downwardly so as; to brightly illuminate the space directlyz'underneath the shade and the a bottom part: (Lwill; brealr uprtherays that are thrown: forwardly and downwardly from the source :ofilight.

lVhen the shade is designed for' use with a: one ligl'i ta fixtureas herein illustrated, the top. part B is made semi-ellipsoidalshapedin generahform and is so arranged that .itiiencases the upper halfof' the light" bulb. in the-fixture and projects forward-1y fromwsamepthebottom part C is made so thiatitwill encasethe-lower half of said bulb-and beposit-ioned at the rear of the forwardly projecting portion' of the top part B and the transparent part D is dis posed horizontally orsubstantially so so that iti wil'luserve as a closure for the portion oflthe topgj p'art iB that proj ects forwardly beyond the bottom part C. The inner end portion of the shade is cylindrical in general form so that it can be inserted in a collar 1 on the fixture and retained therein by screws or other suitable devices 2 that project into an annular groove 3 in the wish it to be understood that my invention is not limited to a shade or light difl'user having parts of the particular shape and arrangement mentioned, or a shade that is designed for use with a one-light fixture. The important thing is that the top part of the shade be constructed of translucent material or material having similar characteristics, and be of such shape that it will project forwardly beyond the source of light; that the underside of the forwardly-projecting portion of the top part be closed by a transparent part that will not intercept the rays that are reflected downwardly by the forwardly-projecting portion of the top part of the shade; and that the under portion of-the shade which is located at the rear of said transparent part be of such construction that the downward rays from the source of light will be broken up effectively enough to produce a soft light.

If a shade of the construction above described is used with a side wall fixture that is positioned above a table or desk, the top of the desk will be brilliantly illuminated by the direct rays that are projected downwardly through the transparent part D of the shade, and the space above, in front of and at the sides of the fixture will be softly illuminated by the rays which pass through the translucent parts B and C ofthe shade. Accordingly, such a shade is particularly adapted for use in hospitals, because it will supply ample light to a nurses table or desk arranged underneath the shade, without being objectionable or injurious to the eyes of a patient lying in a bed positioned in the room at such a point that the patient looks at or towards the fixture. As the shade is constructed in one piece, it can be manufactured at a low cost, and as there are no joints or openings in same through which insects and dustcan pass, it is possible to keep the shade in a clean and sanitary condition by simply wiping off. the dust that accumulates on the exterior of sam'e. While I have herein referred to the shade as a shade or light diffuser for electric side wall fixtures, I have defined the shade in this. way merely to distinguish it f,ro1 n shades, for. ceiling fixtures, for the shade is'well adapted for :use with; desk lights, and ,in fact, any] type or kind of light/that is arrangedon intended to be arranged in comparatively.

close proximity to a surface such as a desk or table which it is desired to brightly illuminate, one of the main distinguishing characteristics of my improved shade being that it will break up the major portion of the rays from the source of light with which it is used in such a manner as to softly illuminate a room and at the same time produce a brilliant light on a table or desk over which it is positioned.

Having thus described my invention, what Iclaim as new and desire to secure by Letters Patent is:

1. A shade or light diffuser for electric lighting fixtures of the kind mentioned, comprising a translucent top part of semiellipsoidal form in general outline that overhangs the source of light and projects forwardly beyond the same, a closure for the forwardly-projecting portion of said top part formed by a transparent part that is disposed horizontally or substanitally so, and a translucent bottom part arranged under the source of light at the rear of said transparent part and projecting downward- 1y below the same.

2. A shade'or light difiuser for electric lighting fixtures of the kind mentioned, comprising a translucent top part of semiellipsoidal form in general outline, a closure for the front portion of said top part constructed of clear glass or the like and dis posed substantially horizontally, and a bottom part arranged at the rear of said closure and projecting downwardly below the same, said top part, closure and bottom part being integrally connected together.

3. A shade or light diffuser for electric lighting fixtures of the kind mentioned, comprising atranslucent top part of semiellipsoidal shape in general outline, a trans- I lucent bottom part of less length than said top part arranged below the inner end portion of same and provided vwith a convexed front end, and a horizontally disposed trans parent part that serves as a closure for the portion of said top part that projects forwardlyibeyond the front end of said bottom part.

4. A shaderor light difi'user for electric lighting fixtures of the kind mentioned,

comprising a one-piece member constructed of glass and provided with a bottom part that encases the lower half of a light bulb positioned in the fixture, a translucent top partthat encases the upper half of said bulb and projects forwardly beyond the same, and a transparent part thatserves as. a closure for'the forwardly-projecting-portlOllzOf said: top part. and which is disposed horizontally or substantially so.

] i f .i-IARRYCADAM. 

